B-62 © 2018 Glenair, Inc • 1211 Air Way, Glendale, CA 91201 • 818-247-6000 • www.glenair.com • U.S. CAGE code 06324 • SuperNine® CatalogDimensions in Inches (millimeters) are subject to change without notice.

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�� Blind-mate, fixed and float-mount interconnects for non-ITAR commercial as well as military/defense applications�� Adjustable separation force (AKA assisted-release, zero extraction force) solutions�� Misalignment accommodation and special auxiliary sealing for trouble-free blind mating in environmental applications�� Available in most symmetrical MIL-STD-1560 insert arrangements with contacts sizes from #23 to #8�� Selected materials offer low outgassing properties and high resistance to both corrosion and stress corrosion cracking�� NASA outgassing bake-out process available�� Designed to withstand the rigors of launch and flight—including shock, vibration, thermal vacuum, acceleration, and temperature extremes�� Standard accessory threads and teeth per MIL-DTL-38999 accommodate a wide range of backshell accessories�� Crimp-removable contacts standard. Consult factory for PC tails, dual-flange standoffs, custom blind-mate configurations, and hermetically sealed options

Unmated Test Voltages, AC RMS, 60 HzAltitude

(Feet) Service Rating M Service Rating N Service Rating I Service Rating II

Sea Level 1300 1000 1800 230050,000 550 400 600 80070,000 350 260 400 500

100,000 200 260 200 200

Current RatingSize Contact Amps

23 522D 520 7.516 1312 23

Application: Glenair Series 253 blind-mate connectors are designed to meet applicable environmental, electrical and mechanical performance characteristics of D38999 Series III. The technology is well suited for use in commercial rack-and-panel instrumentation applications, as well as a blind-mate solution for satellite deployment, scientific research and development payloads, interstage, UAV, and munitions release and more.

Space-Grade Circular Blind-Mate Connectors

B-63© 2018 Glenair, Inc • 1211 Air Way, Glendale, CA 91201 • 818-247-6000 • www.glenair.com • U.S. CAGE code 06324 • SuperNine® CatalogDimensions in Inches (millimeters) are subject to change without notice.

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SERIES 253

Space-grade, blind-mate float-mount and adjustable separation force connectorsMIL-DTL-38999 Series III type, environmental, crimp contact

CRITICAL MECHANICAL FEATURES OF BLIND-MATE AND ADJUSTABLE SEPARATION FORCE (ZEF) CONNECTORS

Roll-off nose: allows for the smooth disconnection

of blind mate plugs and receptacles. Without this

feature, connectors can catch or hang during mate and

demate.

Float mounting: allows for a modicum of coplanar

movement of the receptacle during rack-and-panel and other blind mate

applications, preventing both contact and shell damage.

Misalignment accommodation: Additional

radial, axial, and angular misalignment during

mating is accounted for in the receptacle design with

integral wave springs.

Assisted separation force: Glenair supplies two styles of spring-loaded blind-mate connectors. Adjustable kick-off styles

feature spring-loaded posts on the plug and an adjustment ring on the receptacle used to calibrate separation force. A second style uses wave springs on the shell body.

Sealing: Misalignment accommodation makes environmental sealing difficult in blind-mate

connectors. The problem is solved with auxiliary external

seals.

EMI shielding: Glenair incorporates ground springs in receptacle connectors as well as grounding fingers in special

coupling nut-equipped plugs (253-018-G6 feed-thru shown) to optimize 360° shell-to-shell continuity.

Available non-ITAR environmental blind-mate and adjustable separation force solutionsBasic Part No. Description Mates With

253-014 Fixed jam-nut mount plug with roll-on/roll-off nose and Accessory threads 253-015253-015 Floating jam-nut mount receptacle with misalignment accommodation and optional sealing 253-014253-016 Fixed wall mount plug with spring assist (zero separation force) 253-017253-017 Floating wall mount receptacle with adjustable separation force and misalignment accommodation 253-016

253-018-07 Blind-mate feed-thru, jam-nut mount plug with B-side D38999 type receptacle mating interface and assisted kick-off (spring force) 253-019

253-018-G6 Blind-mate in-line feed-thru with B-side D38999 type plug mating interface and assisted kick-off (spring force) 253-019253-019 Floating jam-nut mount receptacle with misalignment accommodation and optional sealing 253-018253-031 Blind-mate jam-nut mount plug with kick-off spring and accessory threads 253-032253-032 Floating jam-nut mount receptacle with misalignment accommodation 253-031253-033 Float mount feed-thru, jam nut mount receptacle to 38999 type Series III plug mating interface 253-019253-025 Locking circuit and test mate connector 253-016